Question 45638
<pre>y=13-3x
2x+9y=-8

the first equation tells you that y=13-3x.  so, replace y in the second equation with (13-3x).

2x+9(13-3x)=-8.   

simple enough.  Now solve.[distribute]

2x+117-27x=-8  -117, both sides
-25x=-125  divide by -25
x=5